Sewing-machine cutting mechanism.



J. BIGELOW.

SEWING MACHINE CUTTING MECHANISM.

APPLICATION FILED JULY 190A.

Patented Nov. 17, 1914.

5 SHEETSSHEET 1.

Witnesses J. BIGELOW. SEWING MACHINE CUTTING MECHANISM. APPLICATIONFILED JULY 8, 1904.

1,1 17,160", Patented Nov. 17,1914.

- 5 SHEETSSHEBT 2.

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J. BIGELOW.

SEWING MACHINE CUTTING MECHANISM.

APPLICATION FILED JULY 8, 1904 1,1 17, 1 60. Patented Nov. 17, 1914.

5 SHBETSSHEET 3 J. BIGELOWM Patented Nov. 17,1914.

5 SHEETS-SHEET 4.

anvenl'oz J. BIGELOW.

SEWING MACHINE CUTTING MECHANISM.

APPLICATION FILED JULY 8, 1904.

Patented Nov. 17, 1914 5 SHEETSSHEET 6.

lvwenfoz UnrrED STATES PATENT OFFICE.

JOHN'BIGELOW, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO UNION SPECIALMACHINE COMPANY, OF CHICAGO, ILLINOIS, A CQRPORATION OF ILLINOIS.

SEWING-MACHINE CUTTING MECHANISM.

Specification of Letters Patent.

Patented Nov. 1 7, 1914.

Original application filed May 22, 1900, Serial No. 17,552. Divided andthis application filed July 8, 1904. Serial No. 215,795.

plication filedin the United States Patent Ofiice May 22nd,1900, SerialNo. 17,552, and patented December 31, 1907, No. 875,311.

The present invention relates to the mechanism for cutting the threadsbetween any two consecutive sacks, but it will be understood that so faras the cutting members are concerned, they might coiiperate in themanner set forth to sever a continuous strip of material.

So far as the main features of the apparatus are concerned, reference ismade to the aforesaid parent application, but the present inventionconsists in certain matters hereinafter described and referred toin theappended claims.

The invention is illustrated in the accompanying-drawings, in which,

Figure 1 is a front elevation of a filled bag sewing machine embodyingmy invention; Fig. 2 is a vertical cross section on the line u -o ofFig. 1; Fig. 3 is an end view of the cutter or clipper; Fig. 1 is a planview thereof; Fig. 5 is a section on line m w Fig. 3; Fig. 6 is asection on line 2z, of Fig. 3; Fig. 7 is a view similar to Fig. 3, butshowing the opposite side or end of the clipper; and Fig. 8'is avertical sec-' tion on the line yy of Fig. 4. Fig. 9 is a horizontalsection on line 99 of Fig. 1.

As above stated, the present'invention relates to the mechanism employedfor automatically .cutting the thread 'or chain of stitches between thebags; that is, the bag that has been sewedand the one in-the machine.This mechanism is preferably arranged at the delivery end of the workplate. Either the bracket 31 or the arm 51 which extends back of thesewing head is provided with a plate 119, and tothis is attached a block120 having three arms 121, 122 and 123, the latter being provided withthe upwardly extending arms 123 and 123". The arm 121 carries the pivotpin 121, for the yoke lever 125, the lower end of which engages with theend of the arm 126, arranged on the shaft 105, and opposite to the. arm107. The upper end of the lever 12.) is connected by a link 128 to theupper end of a short lever 129, the lower end of which is pivoted on thepin 130 in the side of the block 121. These parts between the shaft 105and the pin 130, constitute the means forlsetting the clipper when themachine started by the throwing of the knee lever 106 The clippercomprises the knife or crushing edge-132, and the cylinder 1325 uponwhich the knife closes. The cylinder 133 is fastened in a pocket that isdrilled therefor in the bottom of the arm123, which pocket cuts throughthe face of the arm or block so that the surface of the hardened steelcyllnder projects slightly beyond the face of the arm 123. The cylinderis held in place by a screw 13% upon loosening wh ch the cylinder may betaken out or turned slightly to present a fresh surface to the cuttingedge of the knife. The knife 132 is mortisedinto theweighted end 135 ofthe clipper arm 136. The mortise or pocket 135 for the knife 132 ispreferably made partly in thesolid part of the arm 136 and partly in thecap or block 135" upon the inner side thereof. The knife is secured bythe adjusting screw 137 and the set screw 138. The clipper arm- 136 isprovided with bosses or a sleeve 139 jounnaled upon the short shaft 140extending between the upper ends of the arms 123 and 123". On the sameshaft 140 is the escapement member 141 provided with a hand settinglever 142. The sleeve 139 and the member 1 11 carry the arms 14.3 and144: respectively. These arms are held together by the buffer-spring 145arranged between the arm 113 and the head of a curved bolt or pin 146that is fastened in the part 144.

147 is a strong spring coiled around the boss or hub of the escapementmember 141 and fastened to said member and to the arm 123 so as to throwthe member forward and thereby throw down the clipper arm 136. Themember 141 is provided with-a laterallyextending lug 148, which, whenthemember is raised or set with the arm l36 in'its raised position, isremoved from the arm 123, but

when the member 141 is released said lug l t-8 will strike said arm 193before the knife of the clipper strikes the cylinder or cutting surface133, after which the clipper arm continues its movement because of itsreomentum. At -this time the spring 145 is compressed, and the knifestrikes the cylinder 133 and is then instantly Withdrawn. to theposition shown in Fig. 3 by the reflex action of the spring 14-5.

:29 is a stop screw provided on the clipper atrial-3'6 to strike theface of the block when the is thrown down, see 8, By means of the screwM9 the device is so a, adjusted that the sharp edge of the knife justmeets the surface of the hardened cylinder 133 and then rebounds, sothat the knife is not dulled except by the actual Wear oi the threadthereon. As the thread or chain of stitches tomes from heneath the iseer foot 130 it is held up by the which haspassed the clipper, and by ashall ledge 150 that is provided upon the yrork- .plate so that thethread will always or 2.5 stretch across the cutting surface 133 readyfor the descent of the knife, (see Figs. 3, ilandil.

- The lever 129 before referred to,

trigger lever 1.51, the rear ich Weighted and; LiQIVfLBYQi carries endof move v link and the lever 129. The trig then engages with theescapement mere- Ml to rotate the same until it is caught and held bythe latch lever 154C, tl'ie forward curl of which engages a sh0ulder'155on the member l lh'holding the member under the tension of the spring147 with the clipper arm in a raised position. When the parts are intli'ese positions, it is only necessary to free the'latch 154: to allowthe lmiife to descend and c1 or clip the thread irnniediately open-seasnot to interfere the next hag. The release or the latch aceomplishedautomatically and depends upon the passage of the hag. is a rock shaftarranged on the arms E3 22 and 123 adapted to be operated by the gravityarm or tri 157. Said shaft 156 also carries theachustahle rocker 158provided with the cross-pin 159 that is iii) adapted to successivelyengage the pins 168 and 161 in the rear ends oi the levers 151 i541 thuswhen the arm 15! drops the n )4 h 1 .ng trigger 191 Will nrst be movedout of the slum r 153 of the ement member and thee. the leeh lrnife. Thearm 15'? is extensible, as shown in Figs. 1 and 3 to 8, low level of theWork plate 0. we sewing head, so that the arm will he struck the knifeor crushi i be thrown to release said. member and only poiver necessaryfor its operation is derived from the shifter lever which the operatorthrows with his leg or knee against the resistance of the shifter spring115 and the small spring 147 of the clipper.

The operation of my device will be obvious. As the knee lever 106 isoperated to start the machine the clipper carrying will be raised hythelever 1.29 througii the trigger lever 151. The clipper is held inelevated position or set by latch lerer 154. The latch is operated bythe arm or trip 157, as it drops from the bag and thus releases theclipper which isnioved by the spring 14:7

to sever the thread The spring 1&5 immediately after the severingaction, moves the clipper away from the cylinder siifii to allow thepassage of the sucseeding sack.

.L a M ii i L .ris the so see i-eaves 1 jlie sewingiineche J. chair sitches will he formed be .i th e, at 1 this chain will the ledge uponthe work plate and across the clipper block-in readiness to he cut bythe lrnite when the arm 157' falls, after having been pre viously raisedby the passing of the bag. The clipper may be set by hand and releasedby hand, if desired, and the machine may .be stopped at any time bythrowing the heed trip 117 to disengage the trigger 110, "whereupon themay he removed from the machine after li the resser foot. 5

Having time described myiiivention, what I claim as new, and desire tosecure by Letters Patent, is:-

l, in an apparatus for sewing tilled hag-5's, sewing" iechanisin and acutting" apparatus controiled by the passage of a bag for severing thethreads hetween the bags including two vcoiiperating members, which whenin operative position embrace between them the thread to he severed,means for causing cooperative action between said members, and meansoperating" immediately after the severing action for positioning one oi?said members to allow the passage of the succeeding bag, suhstantiallyas described.

2. ln s, fiiled hag sewing machine, the combination, with sewingmechanism, of clipper arranged upon the delivery side of said heal, andini'zluding' knife, means for for operating said knife, a supporting 3.In a filled-bag sewing machine, the

combination -with"'.sewing mechanism, a

clipper for severing the threads between bags including a reboundingknife, means frame, and -a hardened cylinder carried by said frame andlying in the plane of movementof said 'lmife.

4. In a filled bagsewing machine, .the bombin'ation', with a sewingmechanism, of a clipperfor severing the thread between two bagsincludinga rebounding knife, a frame therefor, a hardened cylinder setinto saidv framewithits surface projecting therefrom, a fastening devicefor said cylinder which permits-the presenting of new surfaces upon saidcylinder. to said knife, and means for operating said knife,substantially. asne.

scribed.

5'. In a filled bag. sewing machine, the

combination, with sewing mechanism, of a.

clipper for severing thethread between two bags; including a frame, arebounding knife 1 mounted on said frame, a stop for said knife, ahardened surface on said frame lyingin the'plane of movement of thecutting edge of the knife and cooperating therewith, substantially asdescribed.

6. In a filled bag sewing machine, thecombination with sewing mechanism,of a clipper for severing the thread between two .bags including aframe, an arm pivoted thereon, a knifecarried by said arm, an adjustablestop for said arm, a hardened piecein saidframe, a spring operatedmember connected with said arm, and means for setting .and releasingsaid member, substantially as described.

7 In a filled bag sewing machine, the combination, withsewing'mechanism, of a clipper for severing the thread between two bags,including a knife, an arm supporting said knife, -a spring operatedmember for actuating said arm, a setting pawl, means for settingthe-same when the sewing mechanism is started, a latch for said springoperated member, and a tripfor disengaging said latch, substantially asdescribed.

8. In a filled bag sewing machine, the combination, with sewingmechanism, of a clipper for severing the thread between two bagsincluding a knife, a setting pawl, a latch pawl and a swinging arm ortrip adapted to successfully operate said setting and said latchrpawls,substantially as described. I 1

9. In a filled bag sewing machine, the combination, with sewingmechanism, and feeding mechanism, of a clipper comprising a knife, andoperating and controlling means therefor. including devices adapted tobe set when the sewing mechanism is started,

bag by said devices.

10. In a filled bag sewing machine, a

clipper comprising-a crushingv member, a

co6perating.men1ber,-means for operating said crushing member, wherebythe connecting loops of two b'ag's are'severed by a single crushingblow, said operat'ing means includ ing a trip falling from the top ofone of the bags as the bag passes said trip.

11. In a bag sewing machine, a clipper comprising a wedge-shaped cutter,an anvil lyingin the plane of movement of the cutting edge andcooperating therewith, means for operating said cutter including devicescontrolled by the passage of the bag, and means for moving the cutterout of severing-- position to allow the passage of the succeeding bag.

12. In a bag sewing machine, a clipper comprising a wedge shaped cutter,an anvil, means for operating said cutter including devices controlledby the passage of the bag, and means independent of the operating meansfor withdrawing the cutter from the path of the bags.

13. In a bag sewing machine, a clipper comprising a wedge-shaped cutter,an anvil, means for operating said cutter including devices controlledby the passage of the bags, and spring controlled means operating to{)vithdraw the cutter from the path of the ags.

14. In mechanism of the class desscribed,

the combination with severing mechanism movable from a set position, ofmeans for moving it from its set position, means for holding.thesevering mechanism in its set position against the action of themoving means, and a trip for operating the holding means to release thesevering mechanism and permit its actuation bythe moving means, saidtrip being normally held inoperative by the article to be severed.

15. In mechanism of the character described, the combination withmechanism movable from a set position, of a spring for moving it fromsaid set position, means for holding the severing mechanism in its setposition against the action of thespring, and a trip for operating theholding means to release the severing mechanism and permit its actuationby the spring, said trip being normally'held inoperative by the articleto be severed.

16. In mechanism of the class described,

severing tion of the chain, a trip for holding said lulu,

member with the spring under stress, and automatic mechanism forreleasing the trip.

2%. lo. a sewing machine, stitch-forming mechanism, a severing member,means for operating said member including a spring, a trip for holdingthe same With the spring under stress, and means under the control ofthe fabric for moving the trip to release position.

25. In a sewing mechanism, stitch-forming mechanism, a severing member,means for operating said member including a spring, a trip for holdingthe same with the spring under stress, and a trip-releasing meansarranged to engage with the fabric adjacent to the presser foot of themachine.

In a sewing; machine, chain stitch- 17. In mechanism of the classdescribed, the combination with a cutting. member movable from and to aset position, of means for holding the member in its set position, meansfor moving it to its set position, and a trip for d sengaging the memberfrom its holding means, said trip being normally held inoperative by thearticle to be cut.

18. In mechanism of the class described, the combination with movablecutting member, of means for moving it in one direc tion, a device forholding the member against movement by said means, means for moving thecutting member into engagement with the holding device, and meanscontrolled by the article to be cut for re: leasing said member from theholding device. forming mechanism, a cl1ain-severing mom 19. inmechanism of the clas desc. her, a spring for impelling the same in thethe combination \v' a out direction of the chain, a trip for holdingsaid member with the spring under stress, and a trip'releasing meansheld in inoperative position by engagement with the article sewed.

27. A sewing machine including in combination, stitch-forming mechanism,feeding mechanism and thread-severing devices, said thread-severingdevices comprising an anvil and a movable cutting member, said movablecutting member being located at ri ht angles to the line. of feed andsaicllann receiving the impact of said movable member and meanscontrolled by the article being stitched for operating said movablemember.

28. A sewing machine including in combination, stitch-forming mechanism,a feeding mechanism, thread-severing devices including an anvil locatedin the line of feed and. operating to support the thread bemember, oi aso; .1( l 12:16 in bar in one direction, a device for holdin the memberagainst movement by said spring, means for the cutting member intoengagement with the holding device against the tension of the spring,and means controlled by the article to be cut for releasing the cuttingmember from the holding de vice.

20, In mechanism of the class described, the combination with articlesev l m ans for moving the so 7 mechanism for holding" art. e-severingmeans against operative movement by the moving means, and means heldinactive by the articles to be severed for releasing the severing meansfrom the holding mecha- IllSIH,

21. In a sewing machine, the combination of stitch forming mechanism forstitching articles and forming a connecting chain of stitches betweenthe same, a chain. severing member, and means operating independently ofthe article for holding said severing member from. engagement with thechain and means controlled by the articles being stitched for releasingsaid holding means.

22. In a sewing machine, the combination of stitch forming mechanism forstitching; articles and forming a connecting chain of stitches betweenthe same, a chain severing member, means for operating said memberincluding a spring, means operating independent of the articles beingstitched for holding said severing member from engagement with thechain, and means controlled by the articles being stitched forreleasingsaid holding means,

2-3. In a. sewing machine, stitch-forming mechanism for stitchingarticles and forming a connecting chain of stitches between the same anda chainsevering member, a spring for impelling the same in the direc-.

member, and means controlled by the article. bein stitched for operatingsaid movable mem er. o

29. In a sewing machine, a severing member, means for operating the sameincluding a spring, a trip for holding the same away from the chain, alever movable independently of the trip in one direction and positivelyengaging said trip When moving in the opposite direction, and afabric-controlled means through which movement is imparted to said trip.

30. in a sewing machine, a severing device, means for operating sameinclud ing a spring, means for moving said severing device away from thethread, means for locking the severing device in its with drawnposition, and automatic meanslirir releasing the severing device.

31. A filled bag sewing machine includmg in combination a supportingframe, a support for the filled bags projecting forvardly from. thefront face of said support mg frame, a sewing head overhanging saidtween stitched articles, a movable cutting support, stitch formingmechanism carried by said sewing head for stitching filled bags and forforming a connecting line of thread between the same, and means forsevering said line of thread connecting the filled bags, including anarm movably supported in rear of the plane of travel of the mouth of thebags being stitched so as to move in a plane substantially at rightangles to the path of travel of the bags, said arm having a severingmember, a cooperating severing member located in rear of the plane oftravel of the mouth of said bags, and means for actuating said movablearm.

32. A filled bag sewing machine including in combination a supportingframe, a support for the filled bags projecting forwardly from the frontface of said supporting frame, a sewing head overhanging said support,stitch forming mechanism carried by said serving head for stitching the.filled bags and forming a connecting line of thread between the'same,and means for severing the line of thread connecting the filled bagsincluding a supporting arm pivoted in rear of the plane of travelof thebags being stitched to swing in a-plane substantially at right angles tothe connecting line of thread, said arm having a severing member, acooperating severing member.

also located in rear of the plane of-travel of the mouth of said bag,and means mounted on said supporting frame for actuating said pivotedarm.

In testimony whereof I aflix my signature in presence of two witnesses.v JOHN BIGELQW. \Vitnesses A. C. vPAUL, C. G. HANSON.

